<?php

const THEMES = [
    'dark' => [
        'bg' => 0x222222,
        // 'alpha' => 0x303132,
        'alpha' => 0x222222,
    ],
    'light' => [
        'bg' => 0xffffff,
        // 'alpha' => 0xf2f2f2,
        'alpha' => 0xffffff,
    ]
];


function getThemes(): array {
    return array_keys(THEMES);
}

function themeExists(string $name): bool {
    return array_key_exists($name, THEMES);
}

function getThemeAlphaColorAsRGB(string $name): array {
    $color = THEMES[$name]['alpha'];
    $r = ($color >> 16) & 0xff;
    $g = ($color >> 8) & 0xff;
    $b = $color & 0xff;
    return [$r, $g, $b];
}

function getUserTheme(): string {
    if (isset($_COOKIE['theme'])) {
        $val = $_COOKIE['theme'];
        if (is_array($val))
            $val = implode($val);
    } else
        $val = 'auto';
    return $val;
}